Other Balance Sheet Information Summary of Inventories (Detail) (USD $)	Dec. 31, 2013	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials and purchased parts	$ 61,565,000	$ 60,106,000
Work-in-process	17,285,000	20,256,000
Finished goods	17,851,000	17,357,000
Inventory, net	96,701,000	97,719,000
Reserves for excess and obsolete inventory	$ 24,900,000	$ 24,300,000